Milk powder was used as raw material, through the process of reconstitution, pasteurization, inoculation ,fermentation, etc, the casein of the milk was transformed into curd by lactics.
The vegetable juice milk mainly consists of fresh vegetable juice(tomato juice and carrot juice),defatted milk powder and sugar,blending with stabilizer,acidulant and spice ect.
However, after we have finished breast or formula feeding, most of us don't continue producing the complex proteins in our body, which are necessary to break down the lactose.
A common mistake is when people dilute baby formula too much by accident, or when parents dunk their infants up and down in a swimming pool, and in the process the infant gulps in too much water.